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tools lib symbol: Skip non-address kallsyms line

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Adding check on failed attempt to parse the address and skip the line
parsing early in that case.

The address can be replaced with '(null)' string in case user don't have
enough permissions, like:

  $ cat /proc/kallsyms
      (null) A irq_stack_union
      (null) A __per_cpu_start
      ...

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180215122635.24029-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2018-02-15 13:26:27 +01:00 committed by Arnaldo Carvalho de Melo
parent f1f8ad52f8
commit c53b4bb02b
1 changed files with 4 additions and 0 deletions
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4
tools/lib/symbol/kallsyms.c
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@ -38,6 +38,10 @@ int kallsyms__parse(const char *filename, void *arg,
len = hex2u64(line, &start);
/* Skip the line if we failed to parse the address. */
if (!len)
continue;
len++;
if (len + 2 >= line_len)
continue;